It’s Only Common Sense Mastering the Follow-Up—The Key to Closing More Deals
Driving Innovation: Registration in PCB Production Throughout the Process
Dan's Biz Bookshelf: 'Getting Naked: A Business Fable'
Ultrafast laser techniques helped MIT physics graduate student Fahad Mahmood and colleagues establish that electrons form charge-density waves in the thin-film superconductive material LSCO cuprate.
"The question is how does this fluctuating charge-density wave compete or not interfere with superconductivity, and what we found is that it actually competes with superconductivity," Mahmood explains. "Electrons for a very short amount of time are in this charge-density wave state, and in another time scale, if you take another snapshot, they'll be in the superconductivity state."
Charge-density waves occur when electron density in a conductor is distributed in a sinusoidal pattern, like ripples on water, instead of the common uniform density.
"It's a fluctuating order that lasts for a very short amount of time and equilibrium probes won't be able to detect it," he says. Using ultrafast spectroscopy, Mahmood and co-authors of a 2013 Nature Materials paper were able to show that for extremely short periods of time — up to about 2 picoseconds — electrons clustered in a density wave that could be measured by its amplitude and phase.
"This was kind of the very first observation in that particular material that [that] kind of charge-density wave exists, and we were able to make some connections to how it's related to superconductivity as well," says Nuh Gedik, the Lawrence C. (1944) and Sarah W. Biedenharn Career Development Associate Professor of Physics. Gedik spoke about his group's research on topological insulators at the Materials Day Symposium, on Oct.14 in MIT Kresge Auditorium.
Mahmood grew up in Pakistan and won a scholarship to Stanford University, where he studied physics and aeronautical engineering. Now one of Gedik's students, he expects to finish his PhD program next June.
Page 1 of 2
Share on:
Suggested Items
Forge Nano Secures $40M to Scale U.S. Battery Manufacturing and Commercial Semiconductor Equipment Businesses
05/02/2025 | Forge NanoForge Nano, Inc., a technology company pioneering domestic battery and semiconductor innovations, announced the successful close of $40 million in new funding.
Hikrobot Integrates Wiferion Technology Into AMRs
04/30/2025 | HikrobotIn the automotive industry, every second counts. AMRs have to work without interruption - charging breaks mean less productivity. Hikrobot, one of the world's leading providers of mobile robotics, therefore relies on Wiferion's wireless charging technology, which has already established itself as the standard in the industry.
Hikrobot Integrates Wiferion Technology into AMRs
04/29/2025 | WiferionIn the automotive industry, every second counts. AMRs have to work without interruption - charging breaks mean less productivity. Hikrobot, one of the world's leading providers of mobile robotics, therefore relies on Wiferion's wireless charging technology, which has already established itself as the standard in the industry.
CCL Design, Ynvisible Announce Strategic Partnership to Deliver Scalable Printed Display Solutions
04/28/2025 | CCL DesignCCL Design will integrate Ynvisible's proprietary display technology into its global manufacturing infrastructure and technology portfolio.
Candor Elevates PCB Fabrication Services with Continued Facility Upgrades
04/28/2025 | Candor CircuitsOntario-based circuit board manufacturer, Candor Circuit Boards has recently completed a series of facility upgrades to improve their PCB offerings. These investments will allow Candor to provide higher volumes of complicated boards more efficiently with better yield. The new technology has allowed the company to take on exciting high technology projects and collaborations in industries such as Military and Aerospace, Medical, Energy and more.